David Walsh has created a form which allows you to enter the data from your refractometer and evaluate your brews, allowing for a larger sample size for gold cup research. James Hoffmann had a post about this earlier as well. I plan on contributing anyhow. I'm expectng a post from Netphilosopher about oven drying coffee samples, not sure if they will be accepted or not!

Does anyone know where to find the data from the two phases of the David Walsh study?

David Walsh originally posted, "I would envisage this running for about 6 months, at which time the data would be published and freely available for anyone to use/analyse." (his emphasis). I know that a graph summarizing the information was in Vince Fedele's talk last year.

It's nice to have the numbers but they are unfortunately not particularly illuminating.

I was hoping to see the big peak at 19% extraction and the sub-peak at 16% that was illustrated in Vince's talk. Vince used an abbreviated summary of partial submissions from the phase II data. But when you plot all of the phase II data where preference is 7 or higher there is no sub-peak. Oh well.

I guess this coffee stuff is complicated.

edit: I take that back, there does appear to be something there. It's just hard to say without the brew method information.

You had no $20 decent precision/repeatability electronic scale - your best bet was a balance scale. You're dealing with milligrams on one hand (the dissolved solids) in concentrations less than 2% so you have to deal with kilograms...

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